易受刺激
发表于 2025-3-30 11:18:13
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hemophilia
发表于 2025-3-30 16:25:00
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不确定
发表于 2025-3-30 18:34:56
Backwards-Looking Operators in Tense Logic and in Natural Language,at we call, backwards-looking operators. By means of these operators (whose formal counterparts are to a large extent new in the literature) we shall establish the following limiting thesis concerning an adequate semantics for English tenses: For all natural numbers ., the semantics should have a ca